ONE-STEP GENERATION OF GREENBERGER–HORNE–ZEILINGER STATES IN SUPERCONDUCTING QUANTUM INTERFERENCE DEVICES VIA RAMAN INTERACTION

2006 ◽  
Vol 20 (29) ◽  
pp. 1893-1899
Author(s):  
ZHI-MING ZHAN
Keyword(s):  
Quantum Interference ◽  
Cavity Field ◽  
Superconducting Quantum Interference Devices ◽  
Ghz States ◽  
Superconducting Quantum Interference ◽  
Microwave Pulses ◽  
Interaction Scheme ◽  
One Step ◽  
Step Generation ◽  
Raman Interaction

We put forward a fast scheme for one-step generation of maximally entangled Greenberger–Horne–Zeilinger (GHZ) states by superconducting quantum interference devices (SQUIDs) in cavity via Raman interaction. The scheme only requires a quantized cavity field and classical microwave pulses. One of the key advantages of our Raman-interaction scheme is that an improvement of overcoming decoherence for the preparation of the desired GHZ states can be achieved.

GENERATION OF CLUSTER STATES WITH SUPERCONDUCTING QUANTUM-INTERFERENCE DEVICES IN A CAVITY VIA A RAMAN TRANSITION

2010 ◽  
Vol 24 (25) ◽  
pp. 2563-2569
Author(s):  
XIU-MEI JIANG ◽  
DA-MING LIU ◽  
YI-ZHUANG ZHENG
Keyword(s):  
Quantum Information ◽  
Quality Factor ◽  
Quantum Interference ◽  
Cavity Field ◽  
Raman Transition ◽  
Cluster States ◽  
Superconducting Quantum Interference Devices ◽  
Superconducting Quantum Interference ◽  
Cavity Decay ◽  
Experimental Challenge

We propose a scheme to create cluster states with superconducting quantum-interference devices (SQUIDs) with the help of an auxiliary qubit, by using a quantized cavity field and classical microwave pulses, via Raman transition. In our scheme, no transfer of quantum information between the SQUIDs and the cavity is required. The cavity is only virtually excited during the whole operation and thus the cavity decay is suppressed during the operations and the requirement on the quality factor of the cavity is much relaxed, which could greatly reduce the experimental challenge.

scholarly journals INTERFACE OF GRAVITATIONAL AND QUANTUM REALMS

2002 ◽  
Vol 17 (15n17) ◽  
pp. 1135-1145 ◽  
Author(s):  
D. V. AHLUWALIA
Keyword(s):  
Quantum Gravity ◽  
Quantum Interference ◽  
Physical Reality ◽  
Superconducting Quantum Interference Devices ◽  
Superconducting Quantum Interference ◽  
Quantum Gravity Phenomenology ◽  
Wave Particle Duality ◽  
General Relativistic ◽  
Relativistic Description ◽  
Spacetime Foam

The talk centers around the question: Can general-relativistic description of physical reality be considered complete? On the way I argue how – unknown to many a physicists, even today – the "forty orders of magnitude argument" against quantum gravity phenomenology was defeated more than a quarter of a century ago, and how we now stand at the possible verge of detecting a signal for the spacetime foam, and studying the gravitationally-modified wave particle duality using superconducting quantum interference devices.

Realizing various approximate quantum cloning with XY-type exchange interactions of flux qubits

2014 ◽  
Vol 28 (14) ◽  
pp. 1450081 ◽  
Author(s):  
Na Li ◽  
Liu Ye
Keyword(s):  
Quantum Interference ◽  
Exchange Interactions ◽  
Quantum Cloning ◽  
Superconducting Quantum Interference Devices ◽  
Superconducting Quantum Interference ◽  
Flux Qubits ◽  
Universal Quantum ◽  
Experimental Technology ◽  
Real State

In this paper, we realize all kinds of 1 → 2 approximate quantum cloning, including optimal 1 → 2 symmetric (or asymmetric) universal quantum cloning (UQC) and phase-covariant cloning (PCC), symmetric economical phase-covariant cloning (EPCC) and real state quantum cloning, with the XY-type exchange interactions of the flux qubits which are coupled by dc superconducting quantum interference devices (SQUIDs). It is shown that our schemes can be realized with the current experimental technology.

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